MAINTENANCE OF CARBON BRUSHES, BRUSHHOLDERS, .
z Make sure that the brushholders are properly adjusted at the correct angle. z Note if copper dust is present on the brushholders or on the brushholder arms. Sure signs of commutator wear. z Measure and compare the lengths of all brushes on the same brush track to detect abnormal wear. z Check that the brush edges are intact, without burn marks or chips, and that the brush sides do not ...